/Engine/Plugins/Runtime/MeshModelingToolset/Source/MeshModelingTools/Public/EditMeshPolygonsTool.h
Like Extrude/Offset, but performed in a boolean way, meaning that the faces can cut away the mesh or bridge mesh parts.
[UFUNCTION](Programming/UnrealArchitecture/Reference/Functions)(CallInEditor, Category=FaceEdits, Meta=(DisplayName="Push/Pull", DisplayPriority=1)) void PushPull()